package com.heima.wemedia.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.exception.CustomException;
import com.heima.file.service.FileStorageService;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmMaterialDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.Date;
import java.util.UUID;

@Slf4j
@Service
public class WmMaterialServiceImpl extends ServiceImpl<WmMaterialMapper, WmMaterial> implements WmMaterialService {

    @Autowired
    private FileStorageService fileStorageService;


    /**
     * 图片上传
     * @param multipartFile
     * @return
     */
    @Override
    @Transactional
    public ResponseResult uploadPicture(MultipartFile multipartFile) {

        //1.检查参数
        if(multipartFile == null || multipartFile.getSize() == 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.上传图片到minIO中
        String fileName = UUID.randomUUID().toString().replace("-", "");
        //aa.jpg
        String originalFilename = multipartFile.getOriginalFilename();
        int index = originalFilename.lastIndexOf(".");
        if(index > 0){
            //文件名中包含.
            fileName += originalFilename.substring(index);  //.jpg
        }

        String fileId = null;
       try {
            fileId = fileStorageService.uploadImgFile("",
                    fileName, multipartFile.getInputStream());

        } catch (IOException e) {
            log.error("WmMaterialServiceImpl-上传文件失败",e);
            throw new CustomException(AppHttpCodeEnum.SERVER_ERROR);
        }

        //3.保存到数据库中
        try{
            WmMaterial wmMaterial = new WmMaterial();
            wmMaterial.setUserId(WmThreadLocalUtil.getUser().getId());
            wmMaterial.setUrl(fileId);
            wmMaterial.setIsCollection((short)0);
            wmMaterial.setType((short)0);
            wmMaterial.setCreatedTime(new Date());
            save(wmMaterial);
            //4.返回结果

            return ResponseResult.okResult(wmMaterial);
        }catch (Exception e){
            //保存失败，删除图片
            if(fileId != null){
                fileStorageService.delete(fileId);
            }
            throw e;
        }
    }

    /**
     * 素材列表查询
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmMaterialDto dto) {

        //1.检查参数
        dto.checkParam();

        //2.分页查询
        IPage page = new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<WmMaterial> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //Wrappers.<WmMaterial>lambdaQuery
        //是否收藏
        if(dto.getIsCollection() != null && dto.getIsCollection() == 1){
            lambdaQueryWrapper.eq(WmMaterial::getIsCollection,dto.getIsCollection());
        }

        //按照用户查询
        lambdaQueryWrapper.eq(WmMaterial::getUserId,WmThreadLocalUtil.getUser().getId());

        //按照时间倒序
        lambdaQueryWrapper.orderByDesc(WmMaterial::getCreatedTime);


        page = page(page,lambdaQueryWrapper);

        //3.结果返回
        ResponseResult responseResult = new PageResponseResult((int) page.getCurrent(), (int) page.getSize(),(int)page.getTotal());
        responseResult.setData(page.getRecords());
        return responseResult;
    }
}